Wiring Verification Procedure
Do not connect batteries in the UPS.
Use following procedure to verify that the UPS has been wired properly:
51. If your installation includes an XR Enclosure, make sure that the DC breaker (if available) is in the OFF position and that both 125A fuses are removed from the
XR Enclosure.
52. Check that the power wiring is torqued to 45 lbf.in/5Nm.
53. If your installation includes an XR Enclosure, remount the 125A fuses in the XR
Enclosure and check that the DC breaker (if available) on the XR Enclosure is in the ON position.
54. Apply utility power to the system input and measure the voltage at the input terminal block. Record voltages between:
Mains Input:
L1 and N: _________ L2 and N: ________ L3 and N: _______
Bypass Input (for dual mains installations):
L1 and N: _________ L2 and N: ________ L3 and N: _______
Measured voltage must be between 96 and 130. If not, STOP! Verify correct wiring (correct location of N) from the power source to the input wiring connections.
55. Check that the display is powered up.
56. Select the Status Menu on the display, and check that all input voltages are present.
57. Verify L1, L2, L3 clockwise phase rotation using a
58. Test the EPO switch. The system should shut down completely. If not, check the connections and the EPO switch to ensure that they are installed and functioning
correctly. For installations with XR Battery Enclosures, the DC disconnect should
trip to the OFF position at the EPO test (if applicable).
59. Successful completion of steps 1 through 5 indicates that the UPS wiring is correctly installed and functioning correctly. Turn off breakers and switches and
shut down utility power to the system input. See
510. Please leave a wiring diagram on site for service / technical support personnel.
44 | AIS® 3000 |
